It was a mistake on our part and unacceptable.

A mistake is always forgivable, rarely excusable and always unacceptable.

Too many critics mistake the deliberations of the Congress for its decisions.

The river is a great place to recreate for experienced rafters and kayakers. Unfortunately, you make a mistake in this kind of weather and it can be fatal.

Don't make the mistake of playing a favorite, because only one in 10 of these companies succeeds and even Phase III clinical trials (the final stage with tests conducted on large groups of people) often fail, ... You must buy a basket of these stocks as the only defense against their failure rate.

That is unfortunate. It is unacceptable.